DOC: Pandas Cheat Sheet

closes #13202
closes #14943

(cherry picked from commit f79bc7a)

Author: Dr-Irv

doc/cheatsheet/Pandas_Cheat_Sheet.pdf

@@ -0,0 +1,4 @@
+The Pandas Cheat Sheet was created using Microsoft Powerpoint 2013.
+To create the PDF version, within Powerpoint, simply do a "Save As"
+and pick "PDF' as the format.
+

doc/cheatsheet/Pandas_Cheat_Sheet.pptx

@@ -10,6 +10,8 @@ We recommend that all users upgrade to this version.
 Highlights include:
 
 - Compatibility with Python 3.6
+- Added a `Pandas Cheat Sheet <https://github.com/pandas-dev/pandas/tree/master/doc/cheatsheet/Pandas_Cheat_Sheet.pdf>`__. (:issue:`13202`).
+
 
 .. contents:: What's new in v0.19.2
     :local: